The Andaman and Nicobar Islands are a remote archipelago of over 570 islands scattered across the Bay of Bengal, roughly 1,370 kilometers from mainland India. Only about three dozen of these islands are inhabited, and the rest remain wild tangles of rainforest, mangrove, and coral reef. Travelers come here for world-class diving and snorkeling, white-sand beaches that stretch empty for miles, and a layered history that runs from colonial-era imprisonment at the Cellular Jail to the living traditions of indigenous communities. The seafood is exceptional, the water is absurdly clear, and the pace of life runs on island time.
Your ideal window for visiting the Andaman and Nicobar Islands runs from early January through early April. This stretch delivers the driest, calmest conditions of the year, with seas flat enough for scuba diving, snorkeling, and inter-island ferry hopping. February is one of the driest months with only a 4% chance of significant rain, and the Island Tourism Festival in January fills Port Blair with live music, handicraft exhibitions, and cultural performances. If you're flexible on timing, the shoulder weeks of late November and December also work well, though December draws peak crowds and higher accommodation rates. For the clearest underwater visibility and the widest selection of water activities, January through March is the sweet spot.
Spring in Andaman and Nicobar, India
March kicks off with manageable heat and relatively dry skies, making it one of the last comfortable months before the monsoon buildup. Highs average 90.1°F (32.3°C) across the season, so mornings are your best bet for trekking the forested trail from Madhuban to Mount Harriet or exploring the mangrove creeks around Baratang Island. With only a 9% chance of significant rain in March, the seas remain calm enough for scuba diving at sites like Corruption Rock off Chidiya Tapu, and underwater visibility is still excellent. The Tamil community's Panguni Uthiram festival, typically falling in March or April, brings colorful processions honoring Lord Murugan through the streets of Port Blair.
By mid-April, the heat intensifies noticeably, with peak highs reaching 91.9°F (33.3°C) and overnight lows sitting at 77.6°F (25.3°C). The Beach Festival, generally organized by the tourism department in April, transforms stretches of sand on Havelock and Neil Island into venues for volleyball, cultural programs, and adventure sports. Humidity starts climbing, and May flips the switch entirely: rainfall probability jumps to 51%, seas get rougher, and ferry schedules become less reliable. Pack light, breathable clothing, reef-safe sunscreen, and a good hat. This is the slowest season for tourism, which means accommodation deals are easier to find, and popular spots like Radhanagar Beach and Elephant Beach feel far less crowded. Nights stay warm at 76.2°F (24.6°C), so skip the sweater entirely.
Summer in Andaman and Nicobar, India
June through August is full monsoon season in the Andamans. The southwest winds pick up considerably, and seas that were glassy in February now churn with swells. Highs settle to 85.9°F (29.9°C), noticeably cooler than the pre-monsoon blaze, but humidity soars past 85% and rain falls frequently, with roughly two to four days of significant precipitation per week. Many water-based activities shut down or operate on reduced schedules. Ferry connections between Port Blair, Havelock, and Neil Island can face delays or cancellations, so build flexibility into your itinerary if you visit now.
That said, the islands take on a dramatically different character during the rains. The forests turn an impossibly vivid green, waterfalls on Little Andaman come alive, and you'll share the beaches with almost no one. The Monsoon Festival, typically held in July and August in Port Blair, fills the gap with indoor cultural programs, cooking competitions, art exhibitions, and performances by local and visiting musicians. Despite being the quieter season for beach tourism, this period paradoxically sees some of the year's highest visitor numbers from domestic travelers taking advantage of school holidays. Accommodation prices tend to run above average. If you do visit, bring a quality rain jacket, waterproof bags for electronics, and quick-dry clothing. Lows hold steady at 76.3°F (24.6°C), so the warmth never really lets up, even at night.
Fall in Andaman and Nicobar, India
September marks the wettest month of the year, with a 67% chance of significant rain on any given day. Seas remain rough, and dive operators are still cautious about taking boats out to more exposed sites. Highs average 86.8°F (30.4°C) and lows stay at 76°F (24.4°C), a warm and humid combination that blankets the islands in thick tropical air. The Bengali community's Durga Puja celebrations, typically falling in September or October, fill Port Blair with elaborately decorated pandals and cultural performances, giving visitors an unexpected window into mainland Indian traditions transplanted to an island setting.
By late October, the monsoon begins its retreat. Rain probability drops to 43%, and the first hints of calmer seas start to appear. Dive centers gradually reopen, and ferry reliability improves, though conditions remain hit-or-miss compared to the dry season. November marks a turning point: showers become less frequent at 34%, breezes calm down, and the water clarity begins to return. This shoulder period rewards patient travelers with lower accommodation costs and thinner crowds. Birdwatchers will find this a rewarding time at Chidiya Tapu, where migratory species start arriving. The Beach Festival, held toward late November or December on some years, brings cultural events and adventure sports back to the coastline. Bring a light rain layer even in November, as afternoon showers can still catch you off guard.
Winter in Andaman and Nicobar, India
December through February is when the Andaman Islands are at their most inviting. The monsoon has fully cleared, seas flatten to a turquoise calm, and underwater visibility peaks for snorkeling at Jolly Buoy Island and diving at North Bay. Highs average 87.2°F (30.7°C) with lows dipping to a relatively comfortable 74.5°F (23.6°C), the coolest overnight readings of the year. Humidity drops to its annual low, hovering around 70-71% in January and February. The Island Tourism Festival, the archipelago's biggest annual celebration, typically runs for 10 to 15 days spanning late December and January, filling Port Blair with dance performances, handicraft exhibitions, live music, food stalls, and water sports competitions.
January also brings the Subhash Mela, a cultural event near the end of the month commemorating a key figure in India's independence movement, with exhibitions and patriotic programs. February hosts an indie film festival featuring screenings and performances. Rain is minimal throughout the season, with February seeing just a 4% chance of significant precipitation on any given day and January at 7%. This is the time to island-hop by ferry between Port Blair, Swaraj Dweep (Havelock), and Shaheed Dweep (Neil Island), or take a day trip to see the colonial ruins on Netaji Subhash Chandra Bose Island. December draws the year's peak tourist numbers, so book ferries and accommodation well in advance. January and February see slightly thinner crowds while maintaining ideal conditions, making them arguably the best weeks of the entire year for a visit. Pack light cotton clothing, a wide-brimmed hat, and good reef-safe sunscreen.
At a Glance
Monthly weather, visitor crowds, air quality, holidays, and daylight hours to help you plan your trip.
Travel Tips & Safety for Andaman and Nicobar, India
All flights to the Andamans arrive at Veer Savarkar International Airport in Port Blair, with direct connections from Chennai, Kolkata, Bengaluru, Delhi, and Hyderabad. Inter-island transport runs primarily by government and private ferries; the Makruzz catamaran service connects Port Blair to Havelock and Neil Island and is the most comfortable option. Book ferry tickets before locking in hotel reservations, as seats fill quickly during peak season and ferry schedules dictate your island-hopping itinerary.
Stick to bottled or filtered water throughout your stay, and eat seafood at established restaurants where turnover is high to avoid foodborne illness. Saltwater crocodiles inhabit certain mangrove areas and coastal stretches, so swim only at designated beaches and heed local signage. Carry sufficient cash, especially when heading to Havelock or Neil Island, as ATM availability is limited and card payment isn't universal outside Port Blair.